无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2012, Vol. 44 ›› Issue (8): 32-.

• 论文 • 上一篇    下一篇

纯碱副产物氯化钙的提纯实验研究

屠兰英,赵启文,崔小琴   

  1. 青海大学化工学院,青海西宁 810016
  • 发布日期:2012-08-10

Experimental study on purifying by-product calcium chloride of soda ash

 TU  Lan-Ying, ZHAO  Qi-Wen, CUI  Xiao-Qin   

  1. School of Chemical Engineering,Qinghai University,Xining 810016,China
  • Published:2012-08-10

摘要: 以提高纯碱副产物氯化钙的纯度为目的,采用过滤、重结晶、加氧化钙、斜发沸石吸附等除杂方法,进行了氯化钙提纯的实验研究。结果表明:在工业级氯化钙的基础上,通过提纯使氯化钙的含量提高7.3%(质量分数,下同),氯化钠的含量降低52%,氯化镁的含量降低84%,铁含量降低98%,并去除了铅和铜,最终产品中氯化钙、氯化钠、氯化镁、水不溶物、铅、铁、铜的含量均达到了食品级氯化钙的指标。

关键词: 氯化钙, 提纯, 氧化钙, 重结晶, 吸附

Abstract: For the purpose of improving the purity of the by-product calcium chloride of soda ash production,the purification experiments were studied through adopting various impurity removal methods,such as filtering, recrystallization,adding calcium oxide,and clinoptilolite adsorption.Results showed that the content of CaCl2 was increased by 7.3%(mass fraction,same as below),the contents of NaCl,MgCl2,and Fe was reduced by 52%,84%,and 98%,respectively,on the basis of purification of industrial grade calcium chloride;furthermore,Pb and Cu were also removed.The indexes, such as CaCl2,NaCl,MgCl2,water insoluble,Pb,Fe,and Cu of the final product all met the requirements of food grade calcium chloride.

Key words: calcium chloride, purification, calcium oxide, recrystallization, adsorption

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